Ummer, E. K. (2012). Basic mathematics for economics, business, and finance. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUmmer, E. K. Basic Mathematics for Economics, Business, and Finance. London: Routledge, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUmmer, E. K. Basic Mathematics for Economics, Business, and Finance. Routledge, 2012.
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